Netgear HR314 HR314 Reference Manual - Page 113

Wireless Channel Selection, IEEE 802.11a uses Orthogonal Frequency Division Multiplexing OFDM

Get Netgear HR314 - Wireless Router PDF manuals and user guides
UPC - 606449024241
View all Netgear HR314 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 113 highlights

Reference Manual for the Model HR314 802.11a Hi-Speed Wireless Router Wireless Channel Selection IEEE 802.11a utilizes 300 MHz of bandwidth in the 5 GHz Unlicensed National Information Infrastructure (U-NII) band. Though the lower 200 MHz is physically contiguous, the FCC has divided the total 300 MHz into three distinct domains, each with a different legal maximum power output. The radio frequency channels used are listed in Table B-4: Table B-4. 802.11a Wireless Channels U-NII Band Frequency (GHz) Max. Power Output Low 5.15 - 5.25 50 mW Middle 5.25 - 5.35 250 mW High 5.725 - 5.825 1W Note: The high band is not supported in the Model HR314 802.11a Hi-Speed Wireless Router. IEEE 802.11a uses Orthogonal Frequency Division Multiplexing (OFDM), a new encoding scheme that offers certain benefits over a spread spectrum in channel availability and data rate. The 802.11a uses OFDM to define a total of 8 non-overlapping 200 MHz channels across the 2 lower bands; each of these is divided into 52 subcarriers and each carrier is approximately 300 KHz wide. By comparison, 802.11b uses only 3 non-overlapping channels. Network and Routing Basics B-13

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
Reference Manual for the Model HR314 802.11a Hi-Speed Wireless Router
Network and Routing Basics
B-13
Wireless Channel Selection
IEEE 802.11a utilizes 300 MHz of bandwidth in the 5 GHz Unlicensed National Information
Infrastructure (U-NII) band. Though the lower 200 MHz is physically contiguous, the FCC has
divided the total 300 MHz into three distinct domains, each with a different legal maximum power
output.
The radio frequency channels used are listed in
Table B-4
:
Note:
The high band is not supported in the Model HR314 802.11a Hi-Speed Wireless Router.
IEEE 802.11a uses Orthogonal Frequency Division Multiplexing (OFDM), a new encoding
scheme that offers certain benefits over a spread spectrum in channel availability and data rate.
The 802.11a uses OFDM to define a total of 8 non-overlapping 200 MHz channels across the 2
lower bands; each of these is divided into 52 subcarriers and each carrier is approximately 300
KHz wide. By comparison, 802.11b uses only 3 non-overlapping channels.
Table B-4.
802.11a Wireless Channels
U-NII Band
Low
Middle
High
Frequency (GHz)
5.15 – 5.25
5.25 – 5.35
5.725 – 5.825
Max. Power Output
50 mW
250 mW
1W